Pioneer a858 amp no sound from phono stage,
I bought it from ebay and dont know whether someones connected a line level component to it such as a cd player.
and if they had would it kill the phono stage dead. all the other inputs are working fine

This is a nice reference series amp with a decent phono preamp stage. It is unusual to see a phono stage get damaged in this way.... but Murphy's law tells us "If it can be blown up, then someone will do it". I recommend that you do fix it. First up, perhaps check the settings for the preamp on the rear of the amp(from recollection). Be sure that you have it in moving magnet (mm) mode if you are using a MM cartridge.

Although its been a few years, My recollection is that there is a separate power supply for the phono preamp, with maybe even power regulators on on the actual preamp board. First check would be here to see if both DC rails are present for the phono Preamp stages. Most common failure here is heat stressed cracked/dry solder joints.

You need a good HiFi/Audio tech to have a look at it for you if the problems run deeper than DC supply for the preamp. Good luck. A FixYa rating is a great reward for my time to address your problem. Cheers

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Turntables generally do not have a strong enough signal to drive an amplifier. You can check on the back of your turntable and see if it has a switch to change from phono to line level. Most do not, but a few will.

If your turntable does not have this switch, you will need to purchase a phono amplifier to boost the signal to standard line level. You can get these on ebay for around $15.

You connect the turntable to the phono amp input and then connect the phono amp output to any of the inputs on the back of your receiver (aux, cd, etc).

so you have a pre-amp otherwise you aint trying to use otherbinputs
, but the ground cable goes with your sungle phono soursce to the PHONO-preamp and the output is a Line-level , which you should here

It helps to know the details of BOTH entities when an inter-connection is involved.

Most 'new' receivers don't support old-school TT's.

"PHONO" is the only designated connection on an audio device that is literal and exclusive. Nothing but PHONO will work right on it and old-school turntables would require it to preamplify and frequency-correct the tiny current produced by a Phono cartridge. Look up RIAA equalization.

If your unit doesn't have a PHONO connection AND your TT doesn't have a self-contained preamp you will have to get a Phono Preamp to connect between the TT and any Line Level input, like Aux.

If the unspecified Sony has a "PHONO" input you should be good to go. What model?

"PHONO" is the only designated connection on an audio device that is literal and exclusive. Nothing but PHONO will work right on it and old-school turntables would require it to preamplify and frequency-correct the tiny current produced by a Phono cartridge. Look up RIAA equalization.

If your unit doesn't have a PHONO connection AND your TT doesn't have a self-contained preamp you will have to get a Phono Preamp to connect between the TT and any Line Level input, like Aux.

"PHONO" is the only designated connection on an audio device that is literal and exclusive. Nothing but PHONO will work right on it and old-school turntables would require it to preamplify the tiny current produced by a Phono cartridge.

If your unidentified amp doesn't have a PHONO connection AND your TT doesn't have a self-contained preamp you will have to get a Phono Preamp to connect between the TT and any Line Level input, like Aux.

"PHONO" is the only designated connection on an audio device that is literal and exclusive. Nothing but PHONO will work right on it and old-school turntables would require it to preamplify the tiny current produced by a Phono cartridge.
If your unit doesn't have a PHONO connection you will have to get a Phono Preamp to connect between the TT and any Line Level input, like Aux.
eBay always has some... http://shop.ebay.com/?_from=R40&_trksid=p3984.m570.l1311&_nkw=phono+preamp&_sacat=See-All-Categories

Is it connected to a "PHONO" input or something not labeled explicitly for PHONO?

"PHONO" is the only designated connection on an audio device that is literal and exclusive.Nothing but PHONO will work right on it and old-school turntables would require it to preamplify the tiny current produced by a Phono cartridge.

If your unit doesn't have a PHONO connection you will have to get a Phono Preamp to connect between the TT and any Line Level input, like Aux.

The bose as most all in one systems do not have an inbuilt phono stage. Phono especially MM type have a very low signal and an eq curve that gets altered in the phono stage. Without a phono stage (known as a phon pre amp) you will not get much fun from your turntable. To connect : turntable out - into phono preamp - phono pre amp out into bose line in/aux in

Most if not all turntables would need to be connected to a PHONO INput which is high impedance with a high gain pre-amplifier stage. It will not work when connected to an AUX, CD or any line level inputs. Alternately, if your amp does not have any Phono Inputs, you can feed the turntable output to a preamp which can then be connected to any any line level inputs. An example may be found here or here. Additionally, there are some turntables with a built-in preamp.

Hope this be of help/idea. Pls post back how things turned up or should you need additional information.

You need to connect the turntable to a PHONO input on your amplifier. Not all amplifiers have a phono input, if yours doesn't you need to get an RIAA pre-amp to plug your deck into & this connects to your amplifier.

This is because although the audio outputs on the turntable look the same as all the other components, they are very different. The signal has not been amplified up to line-level like tuners, CD players, tape decks, etc. You need to get this thin, weak signal boosted.

Your 3 options are:

* Connect directly to the PHONO input on your amplifier if you have one. If you don't:
* Connect deck to a RIAA amp (also called a phono stage) then connect to any input EXCEPT phono on your amplifier
*Connect the deck to a DJ mixer then hook the mixer up to any input on the amp EXCEPT phono.